The OnClientReordered event is fired after the reorder operation is completed and the dragged tab is being inserted into its new position.
This event will be fired only when the EnableDragToReorder property is set to "true"
The event handler function receives two parameters:
The instance of the tabstrip firing the event.
An eventArgs parameter containing the following methods:
get_tab returns a reference to the RadTab which has been reordered by dragging.
get_domEvent returns a reference to the DOM event object for the action that caused the event to fire.
get_offset returns the offset between the index of the dragged tab before the drag operation and the one where it's dropped.